Measuring the diameter of the raw glass rod is an important problem of quality control in the process of grin lens production.

在自聚焦透镜生产中涉及到一个重要的质量检测问题：毛坯玻璃丝的在线直径测量。

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Suitable for acidic, alkalescent, refractory steel welding rod of diameter of 2 ~ 6.

适用于直径2 ~ 6的酸性、碱性、耐热钢等多种焊条焊接。

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The dependence of the static friction force on a rod immersed in granular matter on the filling height of granules and the diameter of the rod is studied experimentally.

通过实验研究了圆棒在颗粒物质中受到的摩擦力与颗粒填充高度及棒径的关系。

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For both modes of crystal fibre, the pattern of holes is generated by stacking hollow glass tubes a millimetre or so in diameter to form a rod several centimetres thick.

ECONOMIST: A new approach to making optical fibres